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Spatiotemporal variations in growing season exchanges of CO2, H2O, and sensible heat in agricultural fields of the Southern Great Plains (open access)

Spatiotemporal variations in growing season exchanges of CO2, H2O, and sensible heat in agricultural fields of the Southern Great Plains

None
Date: February 23, 2007
Creator: Fischer, Marc; Fischer, Marc L.; Billesbach, David P.; Berry, Joseph A.; Riley, William J. & Torn, Margaret S.
Object Type: Article
System: The UNT Digital Library
Draft photosensor characterization report (open access)

Draft photosensor characterization report

The report presents the results of laboratory measurements performed on The Watt Stopper's LS-201 photosensor at the Lawrence Berkeley National Laboratory in January 2003. The purpose of these measurements was to characterize the spatial and spectral response function of the LS-201 photosensor. Sample results of the spectral response and spatial response are shown.
Date: February 23, 2003
Creator: Rubinstein, Francis M.; Yazdanian, Mehry & Galvin, James
Object Type: Report
System: The UNT Digital Library
Dynamic Diamond Anvil Cell (dDAC): A novel device for studying the dynamic-pressure properties of materials (open access)

Dynamic Diamond Anvil Cell (dDAC): A novel device for studying the dynamic-pressure properties of materials

We have developed a unique device, a dynamic diamond anvil cell (dDAC), which repetitively applies a time-dependent load/pressure profile to a sample. This capability allows studies of the kinetics of phase transitions and metastable phases at compression (strain) rates of up to 500 GPa/sec ({approx}0.16 s{sup -1} for a metal). Our approach adapts electromechanical piezoelectric actuators to a conventional diamond anvil cell design, which enables precise specification and control of a time-dependent applied load/pressure. Existing DAC instrumentation and experimental techniques are easily adapted to the dDAC to measure the properties of a sample under the varying load/pressure conditions. This capability addresses the sparsely studied regime of dynamic phenomena between static research (diamond anvil cells and large volume presses) and dynamic shock-driven experiments (gas guns, explosive and laser shock). We present an overview of a variety of experimental measurements that can be made with this device.
Date: February 23, 2007
Creator: Evans, W. J.; Yoo, C.; Lee, G. W.; Cynn, H.; Lipp, M. J. & Visbeck, K.
Object Type: Article
System: The UNT Digital Library
[Computer Science and Telecommunications Board activities] (open access)

[Computer Science and Telecommunications Board activities]

The board considers technical and policy issues pertaining to computer science, telecommunications, and associated technologies. Functions include providing a base of expertise for these fields in NRC, monitoring and promoting health of these fields, initiating studies of these fields as critical resources and sources of national economic strength, responding to requests for advice, and fostering interaction among the technologies and the other pure and applied science and technology. This document describes its major accomplishments, current programs, other sponsored activities, cooperative ventures, and plans and prospects.
Date: February 23, 1993
Creator: Blumenthal, M. S.
Object Type: Report
System: The UNT Digital Library
Resource use: a summary of the assessments of geothermal resource use limitations of Bruneau KGRA, Castle Creek KGRA, Crane Creek KGRA, Mountain Home KGRA, Vulcan KGRA (open access)

Resource use: a summary of the assessments of geothermal resource use limitations of Bruneau KGRA, Castle Creek KGRA, Crane Creek KGRA, Mountain Home KGRA, Vulcan KGRA

A brief overview is given of the physical, socioeconomic, and heritage resources of each KGRA summarized from the draft reports submitted to EG and G by subcontractors for this project. Included under the subheading of Physical Environment are geology, topography, and ecology with brief mention of climate, hydrology, and soils. Under Socioeconomic and Heritage Resources are demographic and economic data, land use and ownership, and known prehistoric and historic features. The information gaps are listed.
Date: February 23, 1979
Creator: Moore, B.; Savage, N.; Gladwell, J.S. & Warnick, C.C.
Object Type: Report
System: The UNT Digital Library
Electric utility application of wind energy conversion systems on the island of Oahu (open access)

Electric utility application of wind energy conversion systems on the island of Oahu

This wind energy application study was performed by The Aerospace Corporation for the Wind Systems Branch of the Department of Energy. The objective was to identify integration problems for a Wind Energy Conversion System (WECS) placed into an existing conventional utility system. The integration problems included environmental, institutional and technical aspects as well as economic matters, but the emphasis was on the economics of wind energy. The Hawaiian Electric Company utility system on the island of Oahu was selected for the study because of the very real potential for wind energy on that island, and because of the simplicity afforded in analyzing that isolated utility.
Date: February 23, 1979
Creator: Lindley, C.A. & Melton, W.C.
Object Type: Report
System: The UNT Digital Library
Electric filter with movable belt electrode (open access)

Electric filter with movable belt electrode

A method and apparatus are disclosed for removing airborne contaminants entrained in a gas or airstream. The apparatus includes an electric filter characterized by a movable endless belt electrode, a grounded electrode, and a filter medium sandwiched therebetween. Inclusion of the movable, endless belt electrode provides the driving force for advancing the filter medium through the filter, and reduces frictional drag on the filter medium, thereby permitting a wide choice of filter medium materials. Additionally, the belt electrode includes a plurality of pleats in order to provide maximum surface area on which to collect airborne contaminants.
Date: February 23, 1982
Creator: Bergman, W.
Object Type: Patent
System: The UNT Digital Library
Far-infrared studies of superconducting V/sub 3/Si, Nb/sub 3/Ge, and Nb (open access)

Far-infrared studies of superconducting V/sub 3/Si, Nb/sub 3/Ge, and Nb

Optical techniques in the far infrared region (10 to 200 cm/sup -1/) are to explore the basic superconducting behavior of the high temperature superconductors V/sub 3/Si, Nb/sub 3/Ge, Nb, and granular NbN. Such spectroscopy yields accurate gap values, information about the temperature dependence of superconducting properties, values of the electron-phonon spectral function, and insight into grain-to-grain coupling in inhomogeneous geometries. These results are used to calculate basic superconducting parameters such as the coupling constant and the transition temperature with the aim of explaining the underlying physics of superconductors.
Date: February 23, 1981
Creator: Perkowitz, S.
Object Type: Report
System: The UNT Digital Library
Grooved impactor and inertial trap for sampling inhalable particulate matter. [Patents] (open access)

Grooved impactor and inertial trap for sampling inhalable particulate matter. [Patents]

An inertial trap and grooved impactor for providing a sharp cutoff for particles over 15 microns from entering an inhalable particulate sampler is disclosed. The impactor head has a tapered surface and is provided with V-shaped grooves. The tapered surface functions for reducing particle blow-off or reentrainment while the grooves prevent particle bounce. Water droplets and any resuspended material over the 15 micron size are collected by the inertial trap and deposited in a reservoir associated with the impactor.
Date: February 23, 1982
Creator: Loo, B.W.
Object Type: Patent
System: The UNT Digital Library
Leaching study of nuclear melt glass: Part I (open access)

Leaching study of nuclear melt glass: Part I

Ground samples of three nuclear melt glasses from underground nuclear explosions at the Nevada Test Site (NTS) were leached at 25/sup 0/C with natural ground water from NTS. Using our dynamic single-pass flow-through leaching system we monitored the release of radionuclides from the glasses during 420 days of leaching. We continually flowed the ground water over the melt glass at flow rates of 185 ml/day for half of the samples and 34 ml/day for the rest. Leachate solutions were collected continuously, and composite samples, collected on days 1, 2, 3, 6, 11, 32, 38, 70, 120, 230 and 420, were analyzed using low-background Ge(Li) gamma spectrometers. For most of the radionuclides the leach rate decreased smoothly throughout the experiment. Except for /sup 95/Zr, /sup 144/Ce, and /sup 155/Eu, there was no difference between the fast (185 ml/day) and slow (34 ml/day) flow-rate leach rates. The measurable leach rates ranged from a high of 1 x 10/sup -2/ g-glass/m/sup 2/ day for /sup 22/Na (slow flow-rate, day 1 in glass No. 2) to a low of 1 x 6/sup -6/ g-glass/m/sup 2/ day for /sup 54/Mn (slow flow-rate, day 420 in glass No. 2). Most of the leach-rate values were about …
Date: February 23, 1983
Creator: Failor, R. A.; Coles, D. G. & Rego, J. A. H.
Object Type: Report
System: The UNT Digital Library
PC/FRAM, Version 3. 2 User Manual (open access)

PC/FRAM, Version 3. 2 User Manual

This manual describes the use of version 3.2 of the PC/FRAM plutonium isotopic analysis software developed in the Safeguards Science and Technology Group, NE-5, Nonproliferation and International Security Division Los Alamos National Laboratory. The software analyzes the gamma ray spectrum from plutonium-bearing items and determines the isotopic distribution of the plutonium 241Am content and concentration of other isotopes in the item. The software can also determine the isotopic distribution of uranium isotopes in items containing only uranium. The body of this manual descnies the generic version of the code. Special facility-specific enhancements, if they apply, will be described in the appendices. The information in this manual applies equally well to version 3.3, which has been licensed to ORTEC. The software can analyze data that is stored in a file on disk. It understands several storage formats including Canberra's S1OO format, ORTEC'S chn' and SPC' formats, and several ASCII text formats. The software can also control data acquisition using an MCA and then store the results in a file on disk for later analysis or analyze the spectrum directly after the acquisition. The software currently only supports the control of ORTEC MCB'S. Support for Canbema's Genie-2000 Spectroscopy Systems will be added …
Date: February 23, 1999
Creator: Kelley, T. A. & Sampson, T. E.
Object Type: Report
System: The UNT Digital Library
Method of forming a thin unbacked metal foil (open access)

Method of forming a thin unbacked metal foil

The present invention relates generally to metal foils and methods of making the same. More particularly, this invention pertains to the fabrication of very thin, unbacked metal foils.
Date: February 23, 1983
Creator: Duchane, D. V. & Barthell, B. L.
Object Type: Patent
System: The UNT Digital Library
Production Test IP-719: The effect of water plant variables on effluent activity. Final report (open access)

Production Test IP-719: The effect of water plant variables on effluent activity. Final report

One source of the parent materials which are converted into the radioisotopes in reactor effluent is the impurity content of Columbia River water. It has been demonstrated that as the efficiency of removal of the radioisotope parent materials increases, the amount of radioisotopes in the reactor effluent decreases. An example of this is the activity reduction which results from the use of high alum feed. In order to determine whether effluent activity would be influenced by the length of filter run, a half-plant test was initiated at DR Reactor on September 28, 1964, under the authorization of Production Test IP-719. This report presents the results of the test. The water treatment plant at DR Reactor was operated for a three-month period with half the filters on a seven-hour filter cycle and the other half on a 5.25 hour filter cycle. The shorter filter cycle did not significantly reduce either the filtered water turbidity or the P{sup 32} and As{sup 76} concentration in the reactor effluent. It can be concluded that in the range investigated effluent activity is not influenced by the length of filter cycle as long as breakthrough is avoided.
Date: February 23, 1965
Creator: Geier, R. G.
Object Type: Report
System: The UNT Digital Library
Phase Separation and Ordering in InGaAs and InGaAs Materials. Final Report (open access)

Phase Separation and Ordering in InGaAs and InGaAs Materials. Final Report

This report highlights the advances in the understanding of phase separation and atomic ordering in mixed III-V layers. Specifically, the following issues were addressed in the grant period (August 1987 to February 1992): (1) bulk vs surface phase separation; (2) influence of growth technique on phase separation; (3) origin of coarse contrast modulations; (4) influence of dopant diffusion on phase separated microstructures; (5) influence of annealing on carrier mobility in InGaAsP layers; (6) co-existence of CuPt-type ordering and phase separation; (7) influence of growth conditions on ordering; (8) influence of surface reconstruction on atomic ordering.
Date: February 23, 1995
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Chemical Processing Department Monthly Report: January 1965 (open access)

Chemical Processing Department Monthly Report: January 1965

This report details activities of the Chemical Processing Department during the month of January 1965.
Date: February 23, 1965
Creator: Hanford Atomic Products Operation. Chemical Processing Department.
Object Type: Report
System: The UNT Digital Library
The analysis of decontaminated defense waste salt supernate for I-129 (open access)

The analysis of decontaminated defense waste salt supernate for I-129

A method is reported here for the analysis of I-129 in decontaminated defense waste salt solution at concentrations as low as 0.14 pCi/ml. Repeated analyses have been unable to confirm the presence of I-129 in decontaminated samples of Tank 24 supernate.
Date: February 23, 1983
Creator: Ryan, J. P.
Object Type: Report
System: The UNT Digital Library
Project Hanford nuclear facilities list and authorization basis information (open access)

Project Hanford nuclear facilities list and authorization basis information

This report is a compilation of tables that list the nuclear facilities at Hanford and gives the authorization basis for each.
Date: February 23, 1998
Creator: Evans, C. B.
Object Type: Report
System: The UNT Digital Library
[Study of flow properties of wet solids using laser induced photochemical anemometry]. Quarterly technical progress report, April--June 1991 (open access)

[Study of flow properties of wet solids using laser induced photochemical anemometry]. Quarterly technical progress report, April--June 1991

Research continues on the flow properties of wet solids. During this period we have made: progress in the analysis of the accuracy of the technique, progress in firming the foundations of LIPA for Solid-Liquid Mixtures, progress in the construction of better prototype skimmers, continued progress in chemically manufacturing both more red europium imbedded CaF{sub 2} and Green liquid Flowlite, and progress in understanding the coupling of LIPA chemicals snd dynamic range and timing. (VC)
Date: February 23, 1992
Creator: Falco, B.
Object Type: Report
System: The UNT Digital Library
Industrial pulverized coal low NO{sub x} burner. Phase 1 (open access)

Industrial pulverized coal low NO{sub x} burner. Phase 1

The objective of Phase 1 of this program is to develop a novel low NO{sub x} pulverized coal burner, which offers near-term commercialization potential, uses preheated combustion air of up to 1000{degree}F, and which can be applied to high-temperature industrial heating furnaces, chemical process furnaces, fired heaters, and boilers. In the low NO{sub x} coal burner concept, the flue gas is recycled to the burner by jet pump action provided by the momentum of the primary air flow. The recycled flue gas is used to convey the pulverized coal to the jet pump where mixing with the primary air takes place. Ignition occurs downstream of the jet mixing section. The recycled flue gas is at high temperature. When the pulverized coal is entrained, it is heated by conduction from the flue gas. The coal is pyrolyzed to a large extent before being mixed with the primary air. These pyrolysis products are the source of energy for the downstream flame. In this process, the fuel nitrogen associated with pyrolysis products can be converted to molecular nitrogen in the pyrolysis flame if the oxygen is held to substoichiometric concentrations based upon the burning species (pyrolysis products and some char). Pyrolysis products combustion …
Date: February 23, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Fuels Preparation Department monthly report, January 1959 (open access)

Fuels Preparation Department monthly report, January 1959

This document details activities of the Fuels Preparation Department during the month of January 1959. (FI)
Date: February 23, 1959
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Production Test IP-237-A, irradiation of enriched seven-rod cluster elements for ETR testing (open access)

Production Test IP-237-A, irradiation of enriched seven-rod cluster elements for ETR testing

Two Zircaloy-2 jacketed seven-rod cluster elements will be irradiated in the 3674 KE front-to-rear test hole to an exposure of 1000 MWD/T and two elements will be irradiated in the 3674 KW front-to-rear test hole to an exposure of 2000 MWD/T. After irradiation, the elements will be sent to the ETR where they will be ruptured during reactor operation to determine the failure characteristics of co-extruded Zircaloy-2 jacketed cluster elements.
Date: February 23, 1959
Creator: Kratzer, W. K.
Object Type: Report
System: The UNT Digital Library
DOE IGCC Project. Fourth quarterly report, [October 1, 1993--December 31, 1993] (open access)

DOE IGCC Project. Fourth quarterly report, [October 1, 1993--December 31, 1993]

We have previously reported a decision to move the simple cycle commercial operation to a date coincident with the July 1, 1996 Integrated Gasification Combined Cycle (IGCC) commercial operation date. This necessitated a major rescheduling of the engineering and construction efforts to ensure a totally coordinated plan. This rescheduling was completed in mid October 1994 and resulted in an integrated engineering and construction schedule. The major effort in the fourth quarter of 1994 centered around equipment procurement to support the new integrated plan. This is required so that sufficient engineering details will be available to generate construction bid packages with at least 90% completed effort. During the reporting period 43 material requisitions (MR`s) were issued for bids. Also during-the reporting period a total of 14 purchase orders were issued including the generator step-up transformer and major columns and vessels. Bid packages were prepared, for bid submittal in January 1994, for a turnkey sulfuric acid plant and for the transportation/erection of the radiant syngas cooler (RSC). The original concept was for MAN GHH to deliver the RSC as part of their design and fabrication contract. However, in an attempt to improve coordination for the overall handling of this significant piece of …
Date: February 23, 1994
Creator: unknown
Object Type: Report
System: The UNT Digital Library
[Computer Science and Telecommunications Board activities] (open access)

[Computer Science and Telecommunications Board activities]

The board considers technical and policy issues pertaining to computer science, telecommunications, and associated technologies. Functions include providing a base of expertise for these fields in NRC, monitoring and promoting health of these fields, initiating studies of these fields as critical resources and sources of national economic strength, responding to requests for advice, and fostering interaction among the technologies and the other pure and applied science and technology. This document describes its major accomplishments, current programs, other sponsored activities, cooperative ventures, and plans and prospects.
Date: February 23, 1993
Creator: Blumenthal, M. S.
Object Type: Report
System: The UNT Digital Library
COG validation: SINBAD Benchmark Problems (open access)

COG validation: SINBAD Benchmark Problems

We validated COG, a 3D Monte Carlo radiation transport code, against experimental data and MNCP4C simulations from the Shielding Integral Benchmark Archive Database (SINBAD) compiled by RSICC. We modeled three experiments: the Osaka Nickel and Aluminum sphere experiments conducted at the OKTAVIAN facility, and the liquid oxygen experiment conducted at the FNS facility. COG results are in good agreement with experimental data and generally within a few % of MCNP results. There are several possible sources of discrepancy between MCNP and COG results: (1) the cross-section database versions are different, MCNP uses ENDFB VI 1.1 while COG uses ENDFB VIR7, (2) the code implementations are different, and (3) the models may differ slightly. We also limited the use of variance reduction methods when running the COG version of the problems.
Date: February 23, 2004
Creator: Lent, E M; Sale, K E; Buck, R M & Descalle, M
Object Type: Report
System: The UNT Digital Library